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Composition: W
Form: Single Crystal
Material: Tungsten
CAS Number: 7440-33-7
Commodity: Metals
Purity:
99.99%
Thickness:
1mm
Tungsten Square Single Crystal is a high-purity, defect-free form of tungsten valued for its exceptional thermal stability, high melting point, and outstanding electron emission properties. The absence of grain boundaries improves creep resistance and enhances strength at elevated temperatures, making it critical in high-vacuum, aerospace, and electronic applications. Industries use tungsten single crystals in electron microscopy components, thermionic emitters, and X-ray generation devices where performance depends on precise electron behavior. Specific applications include field emission cathodes, ion beam sources, and high-power optics. In research, tungsten single crystals are studied for electron transport, dislocation motion, and recrystallization under extreme stress and temperature. Their unique combination of purity, mechanical strength, and electron emission capability ensures indispensable value in advanced scientific instruments and high-performance electronic systems.
Tolerances
Single Crystal
| Orientation | See Item | |
|---|---|---|
| Thickness | +2% / -1% | |
| Length | +2% / -1% |
Square
| Size | +2% / -1% |
|---|
Material Properties for Metals
Atomic Properties
| Element | Value |
|---|---|
| Atomic number | 74 |
| Crystal structure | Body centred cubic |
| Electronic structure | Xe 4f¹⁴ 5d⁴ 6s² |
| Valences shown | 2,3,4,5,6 |
| Atomic weight( amu ) | 183.85 |
| Thermal neutron absorption cross-section( Barns ) | 18.5 |
| Photo-electric work function( eV ) | 4.55 |
| Natural isotope distribution( Mass No./% ) | 183/ 14.3 |
| Natural isotope distribution( Mass No./% ) | 182/ 26.3 |
| Natural isotope distribution( Mass No./% ) | 186/ 28.6 |
| Natural isotope distribution( Mass No./% ) | 180/ 0.1 |
| Natural isotope distribution( Mass No./% ) | 184/ 30.7 |
| Atomic radius - Goldschmidt( nm ) | 0.141 |
| Ionisation potential( No./eV ) | 1/ 7.98 |
| Ionisation potential( No./eV ) | 2/ 17.7 |
Mechanical Properties
| Element | Value |
|---|---|
| Material condition | Soft |
| Material condition | Hard |
| Poisson's ratio | 0.28 |
| Poisson's ratio | 0.28 |
| Bulk modulus( GPa ) | 311 |
| Bulk modulus( GPa ) | 311 |
| Tensile modulus( GPa ) | 411 |
| Tensile modulus( GPa ) | 411 |
| Hardness - Vickers( kgf mm⁻² ) | 360 |
| Hardness - Vickers( kgf mm⁻² ) | 500 |
| Tensile strength( MPa ) | 550-620 |
| Tensile strength( MPa ) | 1920 |
| Yield strength( MPa ) | 550 |
Electrical Properties
| Element | Value |
|---|---|
| Electrical resistivity( µOhmcm ) | 5.4@20@20°C |
| Superconductivity critical temperature( K ) | 0.0154 |
| Temperature coefficient( K⁻¹ ) | 0.0048@0-100°C |
| Thermal emf against Pt (cold 0C - hot 100C)( mV ) | 1.12 |
Physical Properties
| Element | Value |
|---|---|
| Boiling point( C ) | 5660 |
| Density( gcm⁻³ ) | 19.3@20°C |
Thermal Properties
| Element | Value |
|---|---|
| Melting point( C ) | 3410 |
| Latent heat of evaporation( J g⁻¹ ) | 4009 |
| Latent heat of fusion( J g⁻¹ ) | 192 |
| Specific heat( J K⁻¹ kg⁻¹ ) | 133@25°C |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 173@0-100°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 4.5@0-100°C |
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